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Ask the Vet
Mon Feb 24, 2014 11:14 AM CST

Question:

My veterinarian switched me to a program where I can use modified live vaccines in my pregnant cows. We have had no problems, but I'm concerned because I've read this can cause abortions. Should I stop this program and go back to killed vaccines?

Answer:

This is about risk management. Studies show higher levels of both respiratory and reproductive protection with modified live vaccines (MLV) over their killed cousins. MLVs are also typically less expensive, and are safe when used according to label directions. When selecting a vaccine, be sure ...

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